Will this need to be machined?

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evilally
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Will this need to be machined?

Post by evilally » 09 Aug 2013, 19:20

In the middle of taking an XUD to bits and found this:

Image

...the other 3 are perfect and look like new. This was the cylinder where I had a glow plug snap off in the head. I wonder if some debris has fallen down into the cylinder :( The engine did have a small amount of blow by, I had put that down to the crappy fibre head gasket it had fitted, but perhaps this was the reason. The middle ring on the piston was slightly stuck as well.

The piston crown shows signs of damage:

Image

Chlorate
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Re: Will this need to be machined?

Post by Chlorate » 09 Aug 2013, 19:29

Owwwwwuh...
That's pretty terrible.

evilally
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Re: Will this need to be machined?

Post by evilally » 09 Aug 2013, 19:30

Bugger. I'll take that as a "yes" then? If I get it machined, will I need all 4 machined, or just the damaged one? Then new piston rings I assume? Where's my cheque book......

addo
Sara Watson's Stalker
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Will this need to be machined?

Post by addo » 09 Aug 2013, 20:02

Can you sleeve a diesel? That's what I'd be doing if someone will play along - restore the original bore diameter and fit a good used piston. Yes, new rings.

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spider
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Re: Will this need to be machined?

Post by spider » 10 Aug 2013, 10:58

I'm not sure you can sleeve them, then again it could be machined out a bit and oversize pistons fitted I guess. Not my area.

evilally
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Re: Will this need to be machined?

Post by evilally » 10 Aug 2013, 13:27

I think what I'm going to do is source a decent bottom end. Would a DHX be a suitable donor for a DHY? I can't think why not?

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spider
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Re: Will this need to be machined?

Post by spider » 11 Aug 2013, 13:44

I think so and you avoid the (slight) risk of the DHY 'concern'* I think the DHX is the earlier unit ie pre 97. I'd have to double check that.

*Andy's personal conclusion on that 'concern' was N/A rods fitted to turbo engines.

evilally
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Re: Will this need to be machined?

Post by evilally » 11 Aug 2013, 13:59

Cheers Andy, look what I found:

http://www.ebay.co.uk/itm/FIAT-DUCATO-B ... 2a2e42a25c" onclick="window.open(this.href);return false;

...bit of a bargain I think. The Ducato uses the XUD DHY engine as far as my research indicates. I have read of the DHY "problem" but my understanding is it's only engines made in certain years? It's of no consequence anyway, the engine is getting uprated rods as part of the top secret project ;)

citronut
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Re: Will this need to be machined?

Post by citronut » 12 Aug 2013, 07:46

looks like the reconditioning was just a jet wash off and a coat of black paint,
if it had bin re/conned properly they would have machined/skimmed the top of the block.

you can still see the imprint of the old gasket